CN103185553A - Device for detecting width of board - Google Patents
Device for detecting width of board Download PDFInfo
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- CN103185553A CN103185553A CN2011104511303A CN201110451130A CN103185553A CN 103185553 A CN103185553 A CN 103185553A CN 2011104511303 A CN2011104511303 A CN 2011104511303A CN 201110451130 A CN201110451130 A CN 201110451130A CN 103185553 A CN103185553 A CN 103185553A
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Abstract
The invention discloses a device for detecting width of a board. The device for detecting the width of the board comprises a test platform which is composed of a fixed seat and a platform surface, and four width sensors which are divided into two sets, wherein the platform surface is arranged in front of the fixed seat, two width sensors in each set are arranged at bilateral sides in the board width direction through fixed devices corresponding to the width sensors which are arranged on the platform surface and the two width sensors are located at the same straight line; thickness sensors at the same side between the sets are located at the same straight line in a direction vertical to the board width direction; the sensors are connected with corresponding signal conditioning modules, the corresponding signal conditioning modules are connected with single chip microcomputers in a parallel mode, and the single chip microcomputers are further connected with a computer through serial ports. The device for detecting the width of the board can achieve that the requirements for width detection to nondestructive detection of timbers are met by utilizing ultrasonic waves and other detection means tested by practice of factories, plays a role in conducting the nondestructive online detection to strength of an artificial board, and is an extremely important means for improving the utilization rate of the artificial board.
Description
Technical field
The present invention relates to fields of measurement, particularly relate to a kind of device of sheet material width detection.
Background technology
With the raising of timber demand amount, adopt wood-based plate to replace the log sawn timber to become one of effective ways that efficiently utilize timber resources.The advantage of wood-based plate is: breadth is big, and is structural good, easy construction; The expansion shrinkage factor is low, dimensionally stable, and material is even than sawn timber, is difficult for strain cracking; Be easy to dipping as the veneer of raw material of artifical plate and various particle, thereby can make various functional processing (as fire-retardant, anticorrosion, nonshrink, wear-resisting etc.); Thickness level and the densimetric fraction applicability of wider range are strong; The brake forming performance is better than sawn timber.The shortcoming of wood-based plate is that glue-line can wear out, and the long-time bearing ability has great importance so wood-based plate intensity be can't harm online detection, also is means of crucial importance that improve the wood-based plate utilization factor.Timber detects inconvenience in the prior art, and the defective that detection efficiency is low at present, does not also have the online real-time checkout equipment of timber mechanics intensity in China.
Summary of the invention
Technical matters to be solved by this invention provides the device of sheet material width detection in a kind of sheet material lossless detection method, to realize the Non-Destructive Testing of sheet material, solving the existing timber of prior art detects inconvenient, the defective that detection efficiency is low, and can carry out the division of grade to its detected sheet material.
Principle of work:
According to " through transmission technique " or be transmission beam method, namely with transmitting transducer emission pulsed ultrasonic wave, allow ultrasound wave in the timber that detects, propagate, received by receiving transducer then.The ultrasonic signal that is received is converted into electric signal, carries out sending in the single-chip microcomputer after signal is handled through the ultrasound wave receiving circuit again, can calculate the time of ultrasound wave in sheet material, in basis
V
Speed=L/T (1)
The length of L one sheet material in the formula (1)
The travel-time of T one ultrasound wave in sheet material
V
SpeedThe velocity of propagation of one ultrasound wave in sheet material
Ev=ρ V
Speed 2, (2)
The Ev one sheet material dynamic modulus of elasticity in the formula (2)
ρ one sheet material average density
ρ=M/V
Body(3)
The quality of M one sheet material in the formula (3)
V
BodyThe volume of one sheet material
V
Body=L*W*H (4)
The length of L one sheet material in the formula (4)
The width of W one sheet material
The thickness of H one sheet material
Draw the dynamic modulus of elasticity of sheet material according to (1), (2), (3), (4):
Again because the positive correlation of the mechanical strength of elastic modulus and sheet material is being divided different plates corresponding grade.
Be the detection of the sheet material width in achieving the above object, the present invention is achieved through the following technical solutions:
The invention discloses a kind of device of sheet material width detection, this device comprises:
Test board by holder and table top constitute is provided with table top before the holder;
Be divided into 4 width sensors of two groups, the stationary installation of each width sensor correspondence that two width sensors in each group are provided with by table top respectively is installed in the both sides on the sheet material Width, and is positioned at same straight line; The thickness transducer of the same side is located along the same line in vertical sheet material width degree direction between group;
Each sensor is connected to each self-corresponding signal condition module, and described each self-corresponding signal condition module is parallel to be connected to single-chip microcomputer, and single-chip microcomputer is connected to computing machine by serial ports again.
In said apparatus, described width sensor is the displacement transducer that is built-in with spring.
In said apparatus, described each self-corresponding signal condition module adopts identical circuit form, comprises the preposition instrument amplifying circuit that links to each other successively, eight rank low-pass filter circuits, voltage-current converter circuit, current-to-voltage converting circuit, A/D convertor circuit, single-chip microcomputer Acquisition Circuit.
In said apparatus, the stationary installation of described each width sensor correspondence on the sheet material Width, can deviate from the sheet material motion by air cylinder driven.
In said apparatus, described eight rank low-pass filter circuits comprise 4 circuit form are identical but low-pass filter that parameter is different that wherein each wave filter connects in the mode of series connection.
In said apparatus, described voltage-current converter circuit comprises two operational amplifiers and a P-channel field-effect transistor (PEFT) pipe and a N channel field-effect pipe; Wherein, the positive input terminal of first operational amplifier is the input end of described voltage-current converter circuit, and the source electrode of P-channel field-effect transistor (PEFT) pipe is the output terminal of described voltage-current converter circuit;
The negative input end of first operational amplifier is connected with ground through pull down resistor with the source electrode of N channel field-effect pipe, the output terminal of first operational amplifier is connected with the grid of N channel field-effect pipe, the positive input terminal of second operational amplifier is connected with power supply through pull-up resistor with the drain electrode of P-channel field-effect transistor (PEFT) pipe, the negative input end of second operational amplifier is connected with power supply through pull-up resistor with the source electrode of P-channel field-effect transistor (PEFT) pipe, and the output terminal of second operational amplifier is connected with the grid of P-channel field-effect transistor (PEFT) pipe.
In said apparatus, described current-to-voltage converting circuit adopts the form of three amplifier differential amplifier circuits.
Therefore, the device of a kind of sheet material width detection among the present invention, can realize utilizing ultrasound wave and other detection meanss realize in the Non-Destructive Testing of timber to the requirement of width detection, wood-based plate intensity being can't harm online detection have great importance, also is means of crucial importance that improve the wood-based plate utilization factor.
Description of drawings
Fig. 1 is the system chart of the sheet material lossless detection method in the embodiment of the invention;
Fig. 2 is the sensor installation site synoptic diagram of the sheet material width of measuring device in the embodiment of the invention;
Fig. 3 is one group of width measure system schematic in the sheet material width of measuring device in the embodiment of the invention;
Fig. 4 is the voltage-current converter circuit figure in the embodiment of the invention;
Fig. 5 is the current/voltage circuit diagram in the embodiment of the invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
The specific implementation of the device of sheet material Non-Destructive Testing is provided in the embodiment of the invention, and Fig. 1 is the system chart of the sheet material lossless detection method in the embodiment of the invention, as shown in Figure 1, comprises the following aspects:
1. the device 101 that detects of sheet metal thickness is used for the thickness of sheet material measurement.The measurement of thickness mainly is the subtle change amount of measuring thickness, and each batch thickness of timber in factory is all roughly the same, can be expressed as (W+ Δ w).At first this standard volume is made as W, only need to measure the variation delta w (Δ w has positive and negative branch) of each piece timber and standard value, by the fixing distance of given a pair of displacement transducer, when thickness changes, the amount of compressing into of displacement transducer changes, by signal conditioning circuit, signal is adopted in the controller, thereby carried out THICKNESS CALCULATION.
2. the device 102 of sheet material length detection.In measurement of length, when system can travel forward by sheet material and the friction force of rotary encoder come the motion of driven rotary scrambler, the number of turns of driven rotary scrambler motion obtains the length of sheet material when walking by sheet material measurement.The output of impulse output circuit and phase discriminator inserts after long line transmission in the counting mouth and numeral mouth of data collecting card.Can draw the length of sheet material by the pulse number multiplication by constants of remembering.Constant=(with the girth of the rotary encoder of sheet material touch scrolling)/rotary encoder yardage wherein.
3. after the long end of thickness measuring and survey, arrival is surveyed wide, the static measurement platform of check weighing and velocity of wave, and comprising apparatus for measuring quality 103, width of measuring device 104 and time measurement device 105.The present invention considers the correlative factors such as performance of stressed and LOAD CELLS of objective condition, the rack section of industry spot, adopted the mode of static measurement, after sheet material arrives, behind the static measurement platform, send signal by photoelectric sensor, begin the weighing-up wave of sampling.Repeatedly measure and average to improve the precision of measurement.Because the signal of LOAD CELLS collection is current signal, thus through long line transmission back direct send into after by electric current time variant voltage modulate circuit with data collecting card that host computer links to each other in carry out the collection of data.
4. after weight measurement finishes, the measurement of beginning velocity of wave.Wherein, velocity of wave is measured and is comprised sheet material width of measuring device 104 and the measurement mechanism in the hyperacoustic travel-time on Width 105 again.
With the similar mode of thickness measure, the measurement of width also is the subtle change amount of measuring width.By the fixing distance of given a pair of displacement transducer, when width changed, the amount of compressing into of displacement transducer changed.The output signal of displacement transducer inserts single-chip microcomputer after by signal conditioning circuit.
Wherein, the sheet material width of measuring device comprises the test board that is made of holder and table top, is provided with table top before the holder; Be divided into 4 width sensors of two groups; Each sensor is connected to each self-corresponding signal condition module, and each self-corresponding signal condition module is parallel to be connected to single-chip microcomputer, and single-chip microcomputer is connected to computing machine by serial ports again.Width sensor is the displacement transducer that is built-in with spring.Its corresponding stationary installation on the sheet material Width, can deviate from the sheet material motion by air cylinder driven.
Fig. 2 is the sensor installation site synoptic diagram of the sheet material width of measuring device in the embodiment of the invention, as described in Figure 2, the stationary installation of each width sensor correspondence that two width sensors in each group are provided with by table top respectively is installed in the both sides on the sheet material Width, and is positioned at same straight line; The thickness transducer of the same side is located along the same line in vertical sheet material width degree direction between group.
Fig. 3 is one group of width measure system schematic in the sheet material width of measuring device in the embodiment of the invention, as shown in Figure 3, the signal condition module of displacement transducer correspondence adopts identical circuit form separately, comprise the preposition instrument amplifying circuit that links to each other successively, low-pass filter circuit, voltage-current converter circuit, current-to-voltage converting circuit, analog switch, A/D convertor circuit, single-chip microcomputer Acquisition Circuit.Because the signal of two sensor collections in every group will be sent into the calculating of carrying out width in the single-chip microcomputer, therefore, need be applied to analog switching circuit and realize sampling to handling signal later in batches.
Wherein, what low-pass filter circuit adopted is eight rank low-pass filter circuits, and it comprises 4 circuit form is identical but low-pass filter that parameter is different that wherein each wave filter connects in the mode of series connection.
Fig. 4 is the voltage-current converter circuit figure in the embodiment of the invention, as shown in Figure 4:
Voltage-current converter circuit comprises two operational amplifiers and a P-channel field-effect transistor (PEFT) pipe and a N channel field-effect pipe; Wherein, the positive input terminal of first operational amplifier is the input end of described voltage-current converter circuit, and the source electrode of P-channel field-effect transistor (PEFT) pipe is the output terminal of described voltage-current converter circuit;
The negative input end of first operational amplifier is connected with ground through pull down resistor with the source electrode of N channel field-effect pipe, the output terminal of first operational amplifier is connected with the grid of N channel field-effect pipe, the positive input terminal of second operational amplifier is connected with power supply through pull-up resistor with the drain electrode of P-channel field-effect transistor (PEFT) pipe, the negative input end of second operational amplifier is connected with power supply through pull-up resistor with the source electrode of P-channel field-effect transistor (PEFT) pipe, and the output terminal of second operational amplifier is connected with the grid of P-channel field-effect transistor (PEFT) pipe.Can transmit with the long line that is used for site environment gathering the current signal that voltage signal after the conversion be converted to 0～20mA by voltage-current converter circuit.What traditional voltage-current converter circuit adopted is existing integrated chip, but the circuit that designs among the present invention can be realized electric current and voltage conversion purpose, and have better economy.
Fig. 5 is the current/voltage circuit diagram in the embodiment of the invention, and as described in Figure 5, current-to-voltage converting circuit adopts the form of three amplifier differential amplifier circuits.
Simultaneously, after single-chip microcomputer receives the ultrasonic measuring signal of transmission of host computer, send pulse signal to the ultrasound wave transtation mission circuit, and start-up time, measurement module picked up counting.The pulse signal that sends sends ultrasound wave through excitation ultrasonic sensor behind the ultrasonic transmit circuit, penetrating sheet material is received behind the signal through ultrasound wave receiving circuit conditioned signal by the ultrasonic sensor of the other end, produce edge signal, make the time measurement module stop timing.Single-chip microcomputer is by reading the time data of timing chip, and simultaneously according to before the width data measured, the data of its measurement and the velocity amplitude that calculates are returned to computing machine.
5. the evaluation unit 106 that comprises data acquisition unit and data processing unit.Among the present invention, data acquisition unit is data collecting card, and data processing unit is host computer.Host computer carries out computing according to the data collecting card data that collect and the several data that processing obtains.According to the elastic modulus that draws sheet material of above-mentioned principle to carry out grade classification.
6. the method in the embodiment of the invention also further comprises display unit 107, be used for to show the measurement result of each measurement mechanism, and the sheet material elastic modulus that calculates according to measurement result and the grade situation of sheet material.
Therefore, the device of a kind of sheet material width detection among the present invention, can realize utilizing ultrasound wave and other detection meanss realize in the Non-Destructive Testing of timber to the requirement of width detection, wood-based plate intensity being can't harm online detection have great importance, also is means of crucial importance that improve the wood-based plate utilization factor.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (7)
1. the device of a sheet material width detection is characterized in that, this device comprises:
Test board by holder and table top constitute is provided with table top before the holder;
Be divided into 4 width sensors of two groups, the stationary installation of each width sensor correspondence that two width sensors in each group are provided with by table top respectively makes it be installed in both sides on the sheet material Width, and is positioned at same straight line; The thickness transducer of the same side is located along the same line in vertical sheet material width degree direction between group;
Each sensor is connected to each self-corresponding signal condition module, and each self-corresponding signal condition module is parallel to be connected to single-chip microcomputer, and single-chip microcomputer is connected to computing machine by serial ports again.
2. device according to claim 1 is characterized in that, described width sensor is the displacement transducer that is built-in with spring.
3. device according to claim 1, it is characterized in that, described each self-corresponding signal condition module adopts identical circuit form, comprise the preposition accurate amplifying circuit that links to each other successively, eight rank low-pass filter circuits, voltage-current converter circuit, current-to-voltage converting circuit, A/D convertor circuit, single-chip microcomputer Acquisition Circuit.
4. device according to claim 1 is characterized in that,
The stationary installation of described each width sensor correspondence on the sheet material Width, can deviate from the sheet material motion by air cylinder driven.
5. device according to claim 3 is characterized in that, described eight rank low-pass filter circuits comprise 4 circuit form is identical but low-pass filter that parameter is different that wherein each wave filter connects in the mode of series connection.
6. device according to claim 3 is characterized in that,
Described voltage-current converter circuit comprises two operational amplifiers and a P-channel field-effect transistor (PEFT) pipe and a N channel field-effect pipe; Wherein, the positive input terminal of first operational amplifier is the input end of described voltage-current converter circuit, and the source electrode of P-channel field-effect transistor (PEFT) pipe is the output terminal of described voltage-current converter circuit;
The negative input end of first operational amplifier is connected with ground through pull down resistor with the source electrode of N channel field-effect pipe, the output terminal of first operational amplifier is connected with the grid of N channel field-effect pipe, the positive input terminal of second operational amplifier is connected with power supply through pull-up resistor with the drain electrode of P-channel field-effect transistor (PEFT) pipe, the negative input end of second operational amplifier is connected with power supply through pull-up resistor with the source electrode of P-channel field-effect transistor (PEFT) pipe, and the output terminal of second operational amplifier is connected with the grid of P-channel field-effect transistor (PEFT) pipe.
7. device according to claim 3 is characterized in that,
Described current-to-voltage converting circuit adopts the form of three amplifier differential amplifier circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104511303A CN103185553A (en) | 2011-12-30 | 2011-12-30 | Device for detecting width of board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104511303A CN103185553A (en) | 2011-12-30 | 2011-12-30 | Device for detecting width of board |
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| CN103185553A true CN103185553A (en) | 2013-07-03 |
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| CN2011104511303A Pending CN103185553A (en) | 2011-12-30 | 2011-12-30 | Device for detecting width of board |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362243A (en) * | 2017-11-01 | 2018-08-03 | 泰州市龙洋木业有限公司 | A kind of high-precision plank width detection cutter device |
| CN113091664A (en) * | 2021-04-01 | 2021-07-09 | 佛山市恒溢彩印有限公司 | Width detection method, system, terminal and storage medium |
Citations (3)
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|---|---|---|---|---|
| JPS539563A (en) * | 1976-07-15 | 1978-01-28 | Nippon Steel Corp | Side edge defect detection and size measurement apparatus of traveling materials |
| JPS6012143B2 (en) * | 1978-03-23 | 1985-03-30 | 株式会社東芝 | automatic de-impling equipment |
| CN1109162A (en) * | 1994-03-24 | 1995-09-27 | 孙传波 | Wire length gauge |
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2011
- 2011-12-30 CN CN2011104511303A patent/CN103185553A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS539563A (en) * | 1976-07-15 | 1978-01-28 | Nippon Steel Corp | Side edge defect detection and size measurement apparatus of traveling materials |
| JPS6012143B2 (en) * | 1978-03-23 | 1985-03-30 | 株式会社東芝 | automatic de-impling equipment |
| CN1109162A (en) * | 1994-03-24 | 1995-09-27 | 孙传波 | Wire length gauge |
Non-Patent Citations (2)
| Title |
|---|
| 杨建华 等: "基于单片机的板材在线动态称重系统的设计", 《林产工业》 * |
| 杨建华: "工程结构材密度计算机在线检测系统的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362243A (en) * | 2017-11-01 | 2018-08-03 | 泰州市龙洋木业有限公司 | A kind of high-precision plank width detection cutter device |
| CN113091664A (en) * | 2021-04-01 | 2021-07-09 | 佛山市恒溢彩印有限公司 | Width detection method, system, terminal and storage medium |
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Application publication date: 20130703 |